This vulnerability is due to a logic error in the integration of the Snort Engine rules with Cisco Secure FTD Software that could allow different Snort rules to be hit when deep inspection of the packet is performed for the inner and outer connections. An attacker could exploit this vulnerability by sending crafted traffic to a targeted device that would hit configured Snort rules. A successful exploit could allow the attacker to send traffic to a network where it should have been denied.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | unknown |
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Project Subscriptions
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No advisories yet.
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
Wed, 04 Mar 2026 21:15:00 +0000
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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Wed, 04 Mar 2026 17:45:00 +0000
| Type | Values Removed | Values Added |
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| Description | A vulnerability in the Snort 2 and Snort 3 deep packet inspection of Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass configured Snort rules and allow traffic onto the network that should have been dropped. This vulnerability is due to a logic error in the integration of the Snort Engine rules with Cisco Secure FTD Software that could allow different Snort rules to be hit when deep inspection of the packet is performed for the inner and outer connections. An attacker could exploit this vulnerability by sending crafted traffic to a targeted device that would hit configured Snort rules. A successful exploit could allow the attacker to send traffic to a network where it should have been denied. | |
| Title | Cisco Secure Firewall Threat Defense Software Snort Deep Inspection Bypass Vulnerability | |
| Weaknesses | CWE-284 | |
| References |
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| Metrics |
cvssV3_1
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Projects
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MITRE
Status: PUBLISHED
Assigner: cisco
Published:
Updated: 2026-03-04T20:51:22.783Z
Reserved: 2025-10-08T11:59:15.349Z
Link: CVE-2026-20007
Vulnrichment
Updated: 2026-03-04T20:51:19.421Z
NVD
Status : Received
Published: 2026-03-04T18:16:14.063
Modified: 2026-03-04T18:16:14.063
Link: CVE-2026-20007
Redhat
No data.
OpenCVE Enrichment
No data.